Ohio State Highway Patrol Lt. Robert Sellers says Friday that the situation has ended and there is no threat to the public.
Sources tell WBNS the officer was ambushed and shot by a male suspect. The gunman then reportedly walked into a nursing facility and shot two others.
The victims' conditions were not immediately known. WBNS reports the gunman is "down" after turning the gun on himself.
A local elementary school was put on lock down, and parents later were told they could pick up their children at a nearby middle school.
The village is about 24 miles east of Columbus.